/**
 * @author Iello-Dev
 */
/*
 BarackSlideshow 0.2
 - Libraries required: MorphList <http://devthought.com>
 - MooTools version required: 1.2
 - MooTools components required:
 Core: (inherited from MorphList)
 More: Assets
 
 Changelog:
 - 0.1: First release
 - 0.2: Added 'transition' option. Can be slide-(bottom|top|left|right) or fade, or a function that returns any of those values
 Added 'tween' to options to customize the transition effect
 BarackSlideshow::show now also alters the menu state
 Other tiny changes
 */
/*! Copyright: Guillermo Rauch <http://devthought.com/> - Distributed under MIT - Keep this message! */

var BarackSlideshow = new Class({

    Extends: MorphList,
    
    options: {
        /*
         onShow: $empty,*/
        auto: false,
        autostart: false,
        autointerval: 2000,
        transition: 'fade',
        tween: {
            duration: 700
        }
    },
    
    initialize: function(menu, images, loader, options){
        this.parent(menu, options);
        this.images = $(images);
        this.imagesitems = this.images.getChildren().fade('hide');
        $(loader).fade('in');
        new Asset.images(this.images.getElements('img').map(function(el){
            return el.setStyle('display', 'none').get('src');
        }), {
            onComplete: function(){
                this.loaded = true;
                $(loader).fade('out');
                if (this.current) 
                    this.show(this.menuitems.indexOf(this.current));
                else 
                    if (this.options.auto && this.options.autostart) 
                        this.progress();
            }
.bind(this)
        });
        if ($type(this.options.transition) != 'function') 
            this.options.transition = $lambda(this.options.transition);
    },
    
    auto: function(){
        if (!this.options.auto) 
            return false;
        $clear(this.autotimer);
        this.autotimer = this.progress.delay(this.options.autointerval, this);
    },
    
    click: function(ev, item){
        this.parent(ev, item);
        new Event(ev).stop();
        this.show(this.menuitems.indexOf(item));
        $clear(this.autotimer);
    },
    
    show: function(index){
        if (!this.loaded) 
            return;
        var image = this.imagesitems[index];
        if (image == this.curimage) 
            return;
        image.set('tween', this.options.tween).dispose().inject(this.curimage || this.images.getFirst(), this.curimage ? 'after' : 'before').fade('hide');
        image.getElement('img').setStyle('display', 'block');
        var trans = this.options.transition.run(null, this).split('-');
        switch (trans[0]) {
            case 'slide':
                var dir = $pick(trans[1], 'left');
                var prop = (dir == 'left' || dir == 'right') ? 'left' : 'top';
                image.fade('show').setStyle(prop, image['offset' + (prop == 'left' ? 'Width' : 'Height')] * ((dir == 'bottom' || dir == 'right') ? 1 : -1)).tween(prop, 0);
                break;
            case 'fade':
                image.fade('in');
                break;
        }
        image.get('tween').chain(function(){
            this.auto();
            this.fireEvent('show', image);
        }
.bind(this));
        this.curimage = image;
        this.setCurrent(this.menuitems[index])
        this.morphTo(this.menuitems[index]);
        return this;
    },
    
    progress: function(){
        var curindex = this.imagesitems.indexOf(this.curimage);
        this.show((this.curimage && (curindex + 1 < this.imagesitems.length)) ? curindex + 1 : 0);
    }
    
});
